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2,229-acre lake in Kenora District, Ontario. The lake tops out around 33 ft. The depth chart comes from Ontario Ministry of Natural Resources and Forestry bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The depth data here comes from a transect sounding survey by the Ontario MNRF. The rest of this page walks each species through its year, using the map's own scoring.
The drawn water covers 2,239 acres wrapped in 20.6 miles of bank, broken up by an island. With a shoreline index of 3.1, this water is all arms and coves — edge habitat well beyond its acreage. 95% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. Tip to tip the water measures near 6 mi with a 1.5-mi widest point. It sits in Kenora District. Cordick Lake sits 13 mi south — the closest neighbouring chart.
Start shallow in spring: walleye sit in 4 to 15 ft that time of year. Warm water sends them out to 10 to 33 ft; cold water stacks them in 10 to 33 ft. Top water on the chart: Deep basin, a deep basin in the 22 ft range, prime in winter. Fish it in the evening and early morning and you'll meet the bite. Throw a crawler harness on bottom bouncer or a deep crankbait (trolled) until the fish tell you otherwise.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | Main-lake point (5 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 10 to 33 ft chart-limited; documented 15 to 35 ft | dusk & dawn | Deep basin (22 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 10 to 33 ft chart-limited; documented 12 to 40 ft | dusk & night | Deep basin (22 ft) | Jigging rap, Jig + big minnow |
| Winter | 10 to 33 ft chart-limited; documented 20 to 40 ft | dusk & dawn | Deep basin (22 ft) | Jigging spoon + minnow head, Rattle bait |
Spring northern pike on Assin Lake hold shallow, usually 2 to 8 ft. They move out to 8 to 20 ft in summer and finish the year down in 5 to 15 ft. Put Shallow bay flat first on the milk run — a weed flat near 2 ft that grades prime for spring. The feeding windows run early morning and the evening. The summer box starts with a bucktail or a weedless spoon over cabbage.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (2 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Shallow feeding flat (18 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Shallow feeding flat (18 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Back-bay flat (4 ft) | Tip-ups, Large jigging spoon |
The spring pattern is a shallow one: lake sturgeon in 3 to 15 ft. Midsummer fish sit out in 10 to 33 ft before dropping to 10 to 33 ft for winter. The spot to know is Deep basin, a deep basin in about 22 ft of water that rates prime for lake sturgeon in fall. Plan around after dark and the evening in the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dusk & night | open water | |
| Summer | 10 to 33 ft chart-limited; documented 15 to 40 ft | night & dusk | Deep basin (22 ft) | |
| Fall | 10 to 33 ft chart-limited; documented 15 to 45 ft | dusk | Deep basin (22 ft) | |
| Winter | 10 to 33 ft chart-limited; documented 20 to 60 ft | midday | Deep basin (22 ft) |
Count 8 structure marks on this chart. The deepest, Deep basin, sits near 22 ft.
Season dates, license requirements, and size and bag limits for Ontario waters are set by the Ontario fishing regulations (FMZ summary) — and special regulations can apply to Assin Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Assin Lake is about 33 ft (10 m) deep at its deepest point. The depth data here comes from a transect sounding survey by the Ontario MNRF.
Anglers target walleye, northern pike, lake sturgeon on Assin Lake. This isn't a survey of the lake — none is on record for it — but an informed estimate from the species Ontario's MNRF recorded in the nearest surveyed lakes, filtered to this lake's depth and habitat.
Deep basin is the top-rated area: a deep basin in about 22 ft of water that rates prime for walleye in winter. Open the map above to see every rated spot for each species and season.
For walleye, the summer bite is best in the evening and early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Assin Lake is regulated by the Ontario fishing regulations (FMZ summary). Check the official Ontario regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Cordick Lake 13 mi · Kingfisher Lake 17 mi · Maria Lake 17 mi · Hilyard Lake 19 mi · Wachusk Lake 20 mi · Neawagank Lake 28 mi · Sims Lake 31 mi · Wunnummin Lake 34 mi · Seeseep Lake 38 mi · Unnamed Lake 45 mi · Unnamed Lake 48 mi · Nemeigusabins Lake 49 mi
See how Assin Lake stacks up: best walleye lakes in Ontario · best northern pike lakes in Ontario · best lake sturgeon lakes in Ontario
More water nearby: Kenora District fishing maps (1173 charts). Browse all Ontario fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.